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Showing items 1 through 9 of 8.
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Library Resource
Peru, Colombia, Argentina, Mexico, Brazil, Central America, Northern America, South America
White mold, caused by the fungus Sclerotinia (Whetzelinia) sclerotiorum, is distributed worldwide and has more than 300 hosts. It infects flowers, cotyledons, seeds, leaves or injured plant tissue. The disease can be controlled by crop rotation, flooding, reduced seeding rates, application of chemical products in the middle of the flowering period, modifying plant architecture and the use of resistant var. Many soil microorganisms are associated with sclerotia and may cause them to degrade or fan to germinate. The symptoms and damage caused by the disease are illustrated in color.
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Library Resource
Venezuela, Brazil, Central America, South America
Different nutritional deficiencies or toxicities may limit bean development and yield. N and P deficiencies are the most frequent, although deficiency of minor elements and Al/Mn toxicity can reduce yields considerably. Nutritional problems are usually diagnosed by soil and plant tissue analyses and the observation of symptoms produced by nutritional disorders. Optimum pH for bean production varies between 6.5-7.5; within these limits, the majority of the plant nutrients have their max availability. Color illustrations are given of the symptoms of plant deficiencies and toxicities.
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Library Resource
Peru, Colombia, Argentina, Mexico, Brazil, Central America, Northern America, South America
White mold, caused by the fungus Sclerotinia (Whetzelinia) sclerotiorum, is distributed worldwide and has more than 300 hosts. It infects flowers, cotyledons, seeds, leaves or injured plant tissue. The disease can be controlled by crop rotation, flooding, reduced seeding rates, application of chemical products in the middle of the flowering period, modifying plant architecture and the use of resistant var. Many soil microorganisms are associated with sclerotia and may cause them to degrade or fan to germinate. The symptoms and damage caused by the disease are illustrated in color.
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Library Resource
Brazil, Central America, South America
Se identificaron deficiencias nutricionales (principalmente de P y algo de K, Mg, Zn y Mo) en Calopogonium mucumoides. Se aplico 0- 240 kg de P205 como superfosfato triple, roca fosforica Araxa o termofosfato/ha, en Andropogon gayanus y stylosanthes capitata al momento de la siembra. El establecimiento delas 2 esoecies fue bueno, pero el crecimiento de S. capitata fue tan lento que cuando se corto la pradera de 15 cm, consistia casi de graminea pura.
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Library Resource
Brazil, Central America, South America
En 1977 se inicio la evaluacion de los recursos de tierra para estudiar las regiones de Oxisoles y Ultisoles en America del Sur, con el objeto de ayudar a establecer prioridades tecnicas para el mejoramiento de la tierra. Esta parte del trabajo se completo en 1979, pero el estudio ha sido ampliado para proporcionar informacion sobre otros cultivos de la region Andina, y sobre la produccion de cultivos, agroforestal y de forrajes en America Latina.
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Library Resource
Venezuela, Brazil, Central America, South America
Different nutritional deficiencies or toxicities may limit bean development and yield. N and P deficiencies are the most frequent, although deficiency of minor elements and Al/Mn toxicity can reduce yields considerably. Nutritional problems are usually diagnosed by soil and plant tissue analyses and the observation of symptoms produced by nutritional disorders. Optimum pH for bean production varies between 6.5-7.5; within these limits, the majority of the plant nutrients have their max availability. Color illustrations are given of the symptoms of plant deficiencies and toxicities.
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Library Resource
Kenya, United States of America, Belgium, Japan, Dominican Republic, Mexico, Tanzania, India, Bulgaria, Netherlands, Venezuela, Costa Rica, Barbados, Brazil
Methods for evaluating nutrient status in order to obtain better plant growth and increased yield are constantly being developed and improved. New analytical techniques and procedures for soil and plant analysis have been invented and tested in many countries and laboratories. There have been innovations in data processing leading to preparation of more refined and specific fertilizer recommendations. The purpose of the Consultation was: i.
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Library Resource
Bangladesh, Germany, Peru, Indonesia, Bulgaria, Bolivia, Portugal, Myanmar, Romania, Japan, Turkey, Uzbekistan, Italy, Brunei Darussalam, India, Bhutan, Paraguay, Mexico, Brazil, Greece, South-Eastern Asia
Projections reveal that to sustain the likely world population in the year 2000, an increase of 60 percent in agricultural production will be required. "Is there sufficient land to meet these needs?" becomes the overriding question. However, little precise information exists on which to base a reliable answer. Previous appraisals of the global extents of arable lands, to support present and future human populations, vary from 3 to 7 thousand million hectares. Estimates of the populations these lands can support, vary from 7.5 to 40 thousand million.
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